RMI问题

Question

小弟请教一下RMI的问题
源程序如下:接口类
package rmi;
import java.rmi.*;
public interface imrinterface extends Remote {
    public String DBModify(String string) throws RemoteException;
}接口实现类
package rmi;
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
public class rmiinterfaceimp  extends UnicastRemoteObject implements imrinterface
{
    public rmiinterfaceimp(String name) throws RemoteException
    {
        super();
        try
        { if (java.rmi.Naming.lookup(name) == null)
            Naming.bind(name, this);
        else
            Naming.rebind(name, this);
            
        }
        catch (Exception e)
        {
            if (e instanceof RemoteException)
            {
                throw (RemoteException) e;
            }
            else
            {
                throw new RemoteException(e.getMessage());
            }        }
}    public String DBModify(String string)
    {
    String temp=string;
    temp.concat("ppppppppp");
    return temp;
    }    }客户端
package rmi;
import java.rmi.*;public class rmiclient {
    public void RMIClient()
     {
            try {
                 String serverName = "localhost";
                //指定安全策略文件
                System.setProperty("java.security.policy",
                                   "file:./src/rmi/dbRMI.policy");                //设置系统安全接口
                if (System.getSecurityManager() == null) {
                    System.setSecurityManager(new RMISecurityManager());
                }
            imrinterface temp;
            temp = (imrinterface) Naming.lookup(
                    "//" + serverName + ":1200/DBConnection");            String kao=temp.DBModify("dasdsadsadsadasdasdasdsadas");            System.out.println(kao);
            }
                catch(Exception ee)
                {
                }    }}服务器端package rmi;
import java.rmi.*;
import java.rmi.registry.*;public class rmiServer {
    public static void main(String[] args) throws Exception {
         //指定安全策略文件
         System.setProperty("java.security.policy",
                            "file:./src/rmi/dbRMI.policy");         if (System.getSecurityManager() == null) {
             System.setSecurityManager(new RMISecurityManager());
         }         //启动rmiregistry
         LocateRegistry.createRegistry(1200);
         rmiinterfaceimp dbInterfaceImp = new rmiinterfaceimp("DBConnection");
         System.out.println("Ready.....");
     }}可是运行服务器时出错
E:\Borland\JBuilder2005\jdk1.4\bin\javaw -classpath "E:\Documents and Settings\66\jbproject\rmi2\classes;E:\Borland\JBuilder2005\jdk1.4\bin\JBuilder2005_c.jar;E:\Borland\JBuilder2005\jdk1.4\jre\bin\JBuilder2005_c.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\im\indicim.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\im\thaiim.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\dnsns.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\sunjce_provider.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\ldapsec.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\localedata.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\jsse.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\plugin.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\sunrsasign.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\charsets.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\rt.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\jce.jar;E:\Borland\JBuilder2005\jdk1.4\jre\javaws\javaws.jar;E:\Borland\JBuilder2005\jdk1.4\lib\tools.jar;E:\Borland\JBuilder2005\jdk1.4\lib\dt.jar;E:\Borland\JBuilder2005\jdk1.4\lib\htmlconverter.jar"  rmi.rmiServer 
java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
java.lang.ClassNotFoundException: rmi.DBInterfaceImp_Stub
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:84)
at rmi.rmiinterfaceimp.<init>(rmiinterfaceimp.java:22)
at rmi.rmiServer.main(rmiServer.java:28)
Caused by: java.lang.ClassNotFoundException: rmi.DBInterfaceImp_Stub
at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:219)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:430)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)
at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:631)
at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:257)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:200)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1513)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
... 4 more
Exception in thread "main" 求救的啊

Answer 1

只有stub的
我的用的是Jbuilder2005

Answer 2

rmiinterfaceimp_Skel
rmiinterfaceimp_Stub
都已经产生了
可还是一样的错误的
E:\Borland\JBuilder2005\jdk1.4\bin\javaw -classpath "E:\Documents and Settings\66\jbproject\rmi2\classes;E:\Borland\JBuilder2005\jdk1.4\bin\JBuilder2005_c.jar;E:\Borland\JBuilder2005\jdk1.4\jre\bin\JBuilder2005_c.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\im\indicim.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\im\thaiim.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\dnsns.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\sunjce_provider.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\ldapsec.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\localedata.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\jsse.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\plugin.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\sunrsasign.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\charsets.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\rt.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\jce.jar;E:\Borland\JBuilder2005\jdk1.4\jre\javaws\javaws.jar;E:\Borland\JBuilder2005\jdk1.4\lib\tools.jar;E:\Borland\JBuilder2005\jdk1.4\lib\dt.jar;E:\Borland\JBuilder2005\jdk1.4\lib\htmlconverter.jar"  rmi.rmiServer 
java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
java.lang.ClassNotFoundException: rmi.DBInterfaceImp_Stub
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Naming.java:84)
at rmi.rmiinterfaceimp.<init>(rmiinterfaceimp.java:22)
at rmi.rmiServer.main(rmiServer.java:28)
Caused by: java.lang.ClassNotFoundException: rmi.DBInterfaceImp_Stub
at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:219)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:430)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)
at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:631)
at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:257)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:200)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1513)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
... 4 more
Exception in thread "main"

Answer 3

rmi.DBInterfaceImp_Stub 看看是否存在这个class

Answer 4

是否開啟RMI服務?WINDOWS下
start rmiregistryhoho!

Answer 5

E:\Borland\JBuilder2005\jdk1.4\bin\javaw -classpath "E:\Documents and Settings\66\jbproject\RMI\classes;E:\Borland\JBuilder2005\thirdparty\junit3.8\junit.jar;E:\Borland\JBuilder2005\lib\unittest.jar;E:\Borland\JBuilder2005\jdk1.4\bin\JBuilder2005_c.jar;E:\Borland\JBuilder2005\jdk1.4\jre\bin\JBuilder2005_c.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\im\indicim.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\im\thaiim.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\dnsns.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\sunjce_provider.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\ldapsec.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\ext\localedata.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\jsse.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\plugin.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\sunrsasign.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\charsets.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\rt.jar;E:\Borland\JBuilder2005\jdk1.4\jre\lib\jce.jar;E:\Borland\JBuilder2005\jdk1.4\jre\javaws\javaws.jar;E:\Borland\JBuilder2005\jdk1.4\lib\tools.jar;E:\Borland\JBuilder2005\jdk1.4\lib\dt.jar;E:\Borland\JBuilder2005\jdk1.4\lib\htmlconverter.jar"  Rmiserver 
java.rmi.RemoteException: access denied (java.net.SocketPermission 127.0.0.1:1099 connect,resolve)
at Rmientity.<init>(Rmientity.java:35)
at Rmiserver.main(Rmiserver.java:28)
Exception in thread "main" 
还出现这样的问题

Answer 6

我用的是Jbuilder的
在程序里面打开的了啊
//启动rmiregistry
         LocateRegistry.createRegistry(1200);

Answer 7

在你的jdk_home\jre\lib\security\java.policy文件中加入一下一行：
  permission java.net.SocketPermission "*:1024-65535", "accept,connect,listen,resolve";或者你单独写一个policy文件，命名为xx.policy
然后添加运行参数：
java -Djava.security.policy=xx.policy  classname
在jbuilder中添加运行参数java -Djava.security.policy=policy

Answer 8

我在E:\Documents and Settings\66\jbproject\RMI\src
的目录下面有了一个dbRMI.policy的文件
grant {
permission java.net.SocketPermission "*:1024-65535", "accept,connect,listen,resolve";
        permission java.io.FilePermission "<<ALL FILES>>", "read,write";
};

Answer 9

package  不要用rmi，换个其他的名字try

Answer 10

上述异常為PERMISSION异常,請參照PearLoverQ(66)的結果.俺太長時間不用,忘記了.

Answer 11

原因是客户端调用远程对象的方法时客户端会与服务器端通信，服务器端将远程对象的存根rmi.DBInterfaceImp_Stub的实例序列化后发送给客户端（注意序列化之后的东东仅包括一些实例的状态数据，并不包括DBInterfaceImp_Stub类本身的结构信息），客户端接收到序列化后的数据之后，会在当前环境中寻找rmi.DBInterfaceImp_Stub这个类反序列化成实例驻留客户端内存中。客户端如果没有找到存根类rmi.DBInterfaceImp_Stub，则会抛出ClassNotFoundException。请确认：
1.是否使用rmic生成了远程对象的存根类
2.在启动客户端的时候，是否将存根类的位置放在classpath中，以便客户端运行的时候能找到此类
3.如果没有将存根类的位置放在classpath中，可以使用动态类加载技术。你是否采用了动态类加载。

Answer 12

luckycat(潘鑫) 
麻烦,小弟初次使用JAVA
可否说的更详细一些
谢谢了

Answer 13

把你的邮箱发个消息给我，给你发一份我自己写的模拟rmi的框架，看懂了你基本上就理解了RMI的框架了。

Answer 14

luckycat(潘鑫) 你好,我也在学习rmi你能给我也发一份吗[email protected]谢谢!